Buggy code:
public class LinkPage extends WicketExamplePage { public LinkPage ( ) { } private static class ClickCount implements IClusterable { private int clicks = 0 ; } private static class ClickCountLabel extends Label { public ClickCountLabel ( String id , final LinkPage . ClickCount clickCount ) { } } final LinkPage . ClickCount count1 = new LinkPage . ClickCount ( ) ; Link link1 = new Link ( "link1" ) { @ Override public void onClick ( ) { } } ; @ Override protected void explain ( ) { String html = "<a<seq2seq4repair_space>href=\"#\"<seq2seq4repair_space>wicket:id=\"link1\">this<seq2seq4repair_space>link<seq2seq4repair_space>is<seq2seq4repair_space>clicked<seq2seq4repair_space><span<seq2seq4repair_space>wicket:id=\"label1\">n<//span><seq2seq4repair_space>times<//a>" ; <START_BUG> String code = "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;final<seq2seq4repair_space>ClickCount<seq2seq4repair_space>count1<seq2seq4repair_space>=<seq2seq4repair_space>new<seq2seq4repair_space>ClickCount();<seq2seq4repair_space>////<seq2seq4repair_space>simple<seq2seq4repair_space>counter<seq2seq4repair_space>object\n" + ( ( ( ( ( ( ( ( ( ( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Link<seq2seq4repair_space>link1<seq2seq4repair_space>=<seq2seq4repair_space>new<seq2seq4repair_space>Link(\"link1\")<seq2seq4repair_space>{\n" + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public<seq2seq4repair_space>void<seq2seq4repair_space>onClick()<seq2seq4repair_space>{\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;count1.clicks++;\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;};\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;link1.add(new<seq2seq4repair_space>Label(\"label1\",<seq2seq4repair_space>new<seq2seq4repair_space>Model()<seq2seq4repair_space>{\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public<seq2seq4repair_space>Object<seq2seq4repair_space>getObject()<seq2seq4repair_space>{\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return<seq2seq4repair_space>Integer.toString(count1.clicks);\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}));\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;add(link1);" ) ; <END_BUG> add ( new ExplainPanel ( html , code ) ) ; } }

Fix:
String code = "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;final<seq2seq4repair_space>ClickCount<seq2seq4repair_space>count1<seq2seq4repair_space>=<seq2seq4repair_space>new<seq2seq4repair_space>ClickCount();<seq2seq4repair_space>////<seq2seq4repair_space>simple<seq2seq4repair_space>counter<seq2seq4repair_space>object\n" + ( ( ( ( ( ( ( ( ( ( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Link<seq2seq4repair_space>link1<seq2seq4repair_space>=<seq2seq4repair_space>new<seq2seq4repair_space>Link(\"link1\")<seq2seq4repair_space>{\n" + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public<seq2seq4repair_space>void<seq2seq4repair_space>onClick()<seq2seq4repair_space>{\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;count1.clicks++;\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;};\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;link1.add(new<seq2seq4repair_space>Label(\"label1\",<seq2seq4repair_space>new<seq2seq4repair_space>Model&lt;String&gt;()<seq2seq4repair_space>{\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public<seq2seq4repair_space>Object<seq2seq4repair_space>getObject()<seq2seq4repair_space>{\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return<seq2seq4repair_space>Integer.toString(count1.clicks);\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}));\n" ) + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;add(link1);" ) ;